Hi .Did any of the 1973 Bathurst xu1 race cars run rear finned brakes of the HT HG or HK monaros?
1973 BATHURST XU1 FINNED REAR BRAKES
Started by
grumpy xu1
, Oct 13 2011 03:17 PM
43 replies to this topic
#1
grumpy xu1
-
- Members
-
- 2,809 posts
Lotsa Posts!
- Name:Gary
- Location:Queensland
- Car:lj xu1
- Joined: 01-February 10
Posted 13 October 2011 - 03:17 PM
#2
dattoman
-
- Administrators
-
- 16,470 posts
Do I feel lucky? Well, do ya, punk?
- Name:Neil
- Location:Perth Western Australia
- Car:LX SS , 76 Cadillac , 3 x dattos
- Joined: 04-February 07
Posted 13 October 2011 - 03:34 PM
HK-T-G are 10" brakes
Torana was 9"
So I'd guess no unless someone was cheating
Torana was 9"
So I'd guess no unless someone was cheating
#3
rodomo
-
- Members
-
- 17,998 posts
To advertise here, call 13TORANA
- Name:R - O - B Dammit!
- Location:Way out west of Melbourne Awstraylya
- Joined: 10-December 05
Posted 13 October 2011 - 09:15 PM
Ooooooo? Ahhhhhhh? There's bin a Fred on this? Maybe a lightyear ago?
Conclusion from memory was they had used caravan brake drums?
Conclusion from memory was they had used caravan brake drums?
#4
yel327
-
- Members
-
- 13,078 posts
Oh My, Don't you post alot
- Joined: 10-February 08
Posted 14 October 2011 - 07:11 AM
AFAIK Monaros had the same drums as other HK-HG Holdens, which is the same basic drum as HQ-WB just with a different stud pattern. Every HK-HG Monaro I have ever had including 253 and 307/308 examples have had standard drums. Even my HK-HG GTS's are the same.
#5
rodomo
-
- Members
-
- 17,998 posts
To advertise here, call 13TORANA
- Name:R - O - B Dammit!
- Location:Way out west of Melbourne Awstraylya
- Joined: 10-December 05
Posted 14 October 2011 - 07:44 AM
Ooooooo? Ahhhhhhh? There's bin a Fred on this? Maybe a lightyear ago?
Conclusion from memory was they had used caravan brake drums?
Post #23 http://www.gmh-toran...detroit-locker/
#6
Kockum
-
- Members
-
- 476 posts
Forum Fan
- Location:Southern NSW
- Joined: 27-September 07
Posted 14 October 2011 - 01:16 PM
AFAIK Monaros had the same drums as other HK-HG Holdens, which is the same basic drum as HQ-WB just with a different stud pattern. Every HK-HG Monaro I have ever had including 253 and 307/308 examples have had standard drums. Even my HK-HG GTS's are the same.
I agree with yel327.
From my experience you are more likely to find this type of drum on 6cyl HK T G than any V8 4 speed 10 bolt cars.
As for these 'finned' style drums, most have a horseshoe cut out on the mounting face but some don't. Some also have a number of external steel weights spot welded to them.
No Horseshoe cut out
#7
xu2308
-
- Members
-
- 4,704 posts
Grail Hunter
- Name:AL
- Location:Belconnen ACT
- Car:SMP LJ GTR V8 Prototype-Confirmed By HHS and Ex GMH XW7 Engineers
- Joined: 09-April 09
Posted 14 October 2011 - 04:47 PM
Watch the Chevron DVD GTR XU-1 Torana, When Your Hot your Hot
Go to the Menu, Click on Bathurst 1973 and watch for a few minutes and the HDT LJ XU-1 pulls up, i think its Peter Brock HDT XU-1, the HDT Mechanics pull the Drivers side rear wheel off, get ready with your pause button, and you will see the HDT Cooling Fins, they were made by A.B.S in Adelaide, they made 10 Pairs up for Harry Firth's HDT Workshop, i believe Harry might of ran them on the HDT Rally Cars as well as the HDT Race Cars etc, i believe Harry had them on the HDT Monaros back in the Day, The Monaro Cooling Fins are 10" and the LJ Torana ones are 9" ones
Go to the Menu, Click on Bathurst 1973 and watch for a few minutes and the HDT LJ XU-1 pulls up, i think its Peter Brock HDT XU-1, the HDT Mechanics pull the Drivers side rear wheel off, get ready with your pause button, and you will see the HDT Cooling Fins, they were made by A.B.S in Adelaide, they made 10 Pairs up for Harry Firth's HDT Workshop, i believe Harry might of ran them on the HDT Rally Cars as well as the HDT Race Cars etc, i believe Harry had them on the HDT Monaros back in the Day, The Monaro Cooling Fins are 10" and the LJ Torana ones are 9" ones
#8
_Ozzie Picker_
_Ozzie Picker_
-
- Guests
Posted 14 October 2011 - 08:02 PM
AFAIK Monaros had the same drums as other HK-HG Holdens, which is the same basic drum as HQ-WB just with a different stud pattern. Every HK-HG Monaro I have ever had including 253 and 307/308 examples have had standard drums. Even my HK-HG GTS's are the same.
I agree with yel327.
From my experience you are more likely to find this type of drum on 6cyl HK T G than any V8 4 speed 10 bolt cars.
As for these 'finned' style drums, most have a horseshoe cut out on the mounting face but some don't. Some also have a number of external steel weights spot welded to them.
hi,
i,ve wrecked out many hk,t,g,s and these type of brake drums have been on very early hk 6 cylinders only from the cars i,ve seen.
here,s a pic of the rear brakes off my 73xu1,
#9
frash da bucket
-
- Members
-
- 1,890 posts
Forum Fixture
- Location:NSW
- Joined: 23-April 07
Posted 15 October 2011 - 09:42 AM
Hi,
I have the fined brake drums too,but removed them,they are ABS,with 6 tear drop holes on the face of it.
Cheers John.
I have the fined brake drums too,but removed them,they are ABS,with 6 tear drop holes on the face of it.
Cheers John.
#10
_Mike73_
_Mike73_
-
- Guests
Posted 21 December 2011 - 12:58 PM
A bit more to add to the 9" verses 10" situation.
The C.A.M.S rules state that brakes can be changed as long as the friction area does not change.
Bear in mind that two version Toranas were used, street versions, and race specials.
Given that 14's sprintmasters were available at the time and that there have been reports of Monaro front brakes ( same friction area ) wrere used, it is not a big leap to see that the Monaro rear brakes could have been used ( they may have had to shorten the shoe friction material )
There are many differences between street version XU-1's, Holden built race versions and race team built XU-1's
These differences seem to include;
Camshaft,
Brakes,
reduced body deadening,
Different colour fuel tank cover,
Rim widths and diameters and
Engine specs
There will be more, perhaps a seperate topic would be appropiate.
Mike
The C.A.M.S rules state that brakes can be changed as long as the friction area does not change.
Bear in mind that two version Toranas were used, street versions, and race specials.
Given that 14's sprintmasters were available at the time and that there have been reports of Monaro front brakes ( same friction area ) wrere used, it is not a big leap to see that the Monaro rear brakes could have been used ( they may have had to shorten the shoe friction material )
There are many differences between street version XU-1's, Holden built race versions and race team built XU-1's
These differences seem to include;
Camshaft,
Brakes,
reduced body deadening,
Different colour fuel tank cover,
Rim widths and diameters and
Engine specs
There will be more, perhaps a seperate topic would be appropiate.
Mike
#11
xu2308
-
- Members
-
- 4,704 posts
Grail Hunter
- Name:AL
- Location:Belconnen ACT
- Car:SMP LJ GTR V8 Prototype-Confirmed By HHS and Ex GMH XW7 Engineers
- Joined: 09-April 09
Posted 22 December 2011 - 11:04 AM
I think the A.B.S Cooling Fins that HDT got made up would be lighter than the ones everybody
else got from A.B.S in Adelaide. They would of been casted in SG Iron (Sperodialgraphite Iron as used
in Crankshafts) Harry would of used the SG Iron to make them lighter in weight than the run of the
mill A.B.S Cooling Fins that every one else used, the Old Fox
else got from A.B.S in Adelaide. They would of been casted in SG Iron (Sperodialgraphite Iron as used
in Crankshafts) Harry would of used the SG Iron to make them lighter in weight than the run of the
mill A.B.S Cooling Fins that every one else used, the Old Fox
#12
wot179
-
- Members
-
- 6,784 posts
Green Eggs and Spam
- Name:Jesus Bloody Christ
- Location:Sunny Santa Maria
- Car:Goon
- Joined: 06-February 09
Posted 22 December 2011 - 11:16 AM
So are these finned drums super rare and ridiculously valuable?
#13
xu2308
-
- Members
-
- 4,704 posts
Grail Hunter
- Name:AL
- Location:Belconnen ACT
- Car:SMP LJ GTR V8 Prototype-Confirmed By HHS and Ex GMH XW7 Engineers
- Joined: 09-April 09
Posted 22 December 2011 - 11:23 AM
They are rare in my neck of the woods lol, so i guess they are rare every where, i chatted to the
guy that bought A.B.S out, but he worked for A.B.S for years, he told me about HDT getting made up
a batch for the HDT Monaro's and the HDT LJ xu-1's etc, there were 10 pairs made up for the HDT LJ's
guy that bought A.B.S out, but he worked for A.B.S for years, he told me about HDT getting made up
a batch for the HDT Monaro's and the HDT LJ xu-1's etc, there were 10 pairs made up for the HDT LJ's
#14
wot179
-
- Members
-
- 6,784 posts
Green Eggs and Spam
- Name:Jesus Bloody Christ
- Location:Sunny Santa Maria
- Car:Goon
- Joined: 06-February 09
Posted 22 December 2011 - 12:02 PM
So are there only 10 pairs in the known universe?
Or are there heaps of them around the place?
Or are there heaps of them around the place?
#15
xu2308
-
- Members
-
- 4,704 posts
Grail Hunter
- Name:AL
- Location:Belconnen ACT
- Car:SMP LJ GTR V8 Prototype-Confirmed By HHS and Ex GMH XW7 Engineers
- Joined: 09-April 09
Posted 22 December 2011 - 12:47 PM
There are more than 10 pairs, Harry Firth got 10 special pairs made in SG Iron so they were lighter
than the average Cooling Fins, so less weight means GO Faster for the HDT LJ's, one of Harry many trick
lol
A.B.S in Adelaide would of made up a few for say Taxi's and Caravan's and sounds like HT-HG Kingswood etc
Harry just got his made lighter for racing
than the average Cooling Fins, so less weight means GO Faster for the HDT LJ's, one of Harry many trick
lol
A.B.S in Adelaide would of made up a few for say Taxi's and Caravan's and sounds like HT-HG Kingswood etc
Harry just got his made lighter for racing
#16
S pack
-
- Members
-
- 15,538 posts
Scrivet Counter
- Name:Dave
- Location:Luggage Point
- Car:73 LJ
- Joined: 25-January 10
Posted 21 April 2018 - 08:33 AM
Hi .Did any of the 1973 Bathurst xu1 race cars run rear finned brakes of the HT HG or HK monaros?
Yeah I know it's an old thread.
Here's that screen shot of Brocks RHR brake drum from the 1973 Bathurst 1000 video footage.
#17
RallyRed
-
- Members
-
- 7,840 posts
Oh My, Don't you post alot
- Name:Col
- Location:NSW
- Car:LC GTR etc
- Joined: 02-October 11
Posted 21 April 2018 - 10:25 AM
Not sure about the factory cars. but others were taking advantage of the freedoms regarding brakes.
I have this set ( borrowed off old mate) that are ex 1974 ATCC car
I have this set ( borrowed off old mate) that are ex 1974 ATCC car
Attached Files
-
rps20180421_102115.jpg 137.67K
13 downloads
#18
S pack
-
- Members
-
- 15,538 posts
Scrivet Counter
- Name:Dave
- Location:Luggage Point
- Car:73 LJ
- Joined: 25-January 10
Posted 21 April 2018 - 06:59 PM
Not sure about the factory cars. but others were taking advantage of the freedoms regarding brakes.
I have this set ( borrowed off old mate) that are ex 1974 ATCC car
The HDT cars definitely had them in '73 and so did two other teams.
#19
grumpy xu1
-
- Members
-
- 2,809 posts
Lotsa Posts!
- Name:Gary
- Location:Queensland
- Car:lj xu1
- Joined: 01-February 10
Posted 21 April 2018 - 07:14 PM
Is there any one making these finned rear brake drums any more
#20
RallyRed
-
- Members
-
- 7,840 posts
Oh My, Don't you post alot
- Name:Col
- Location:NSW
- Car:LC GTR etc
- Joined: 02-October 11
Posted 21 April 2018 - 07:32 PM
not sure mate...but if so hope they are lighter ..the ones I posted are just on 1kg heavier than stock.
#21
jd lj
-
- Members
-
- 2,100 posts
Forum Fixture
- Name:James D
- Location:in the shed
- Car:LJ SVO
- Joined: 03-December 10
Posted 21 April 2018 - 08:30 PM
I saw a race car (LJ Torana) in January that was using an alloy version. I think that they were from a Nissan or something. The rear end of this car was far from std and I can't remember the details unfortunately. Maybe I should have listened better.
#22
jd lj
-
- Members
-
- 2,100 posts
Forum Fixture
- Name:James D
- Location:in the shed
- Car:LJ SVO
- Joined: 03-December 10
Posted 21 April 2018 - 08:42 PM
I saw a race car (LJ Torana) in January that was using an alloy version. I think that they were from a Nissan or something. The rear end of this car was far from std and I can't remember the details unfortunately. Maybe I should have listened better.
Google Datsun alloy brake drums and check out some images. That'll get you started in the right direction.
#23
S pack
-
- Members
-
- 15,538 posts
Scrivet Counter
- Name:Dave
- Location:Luggage Point
- Car:73 LJ
- Joined: 25-January 10
Posted 21 April 2018 - 08:45 PM
not sure mate...but if so hope they are lighter ..the ones I posted are just on 1kg heavier than stock.
That seems reasonable considering the extra metal involved in the casting.
#24
xu2308
-
- Members
-
- 4,704 posts
Grail Hunter
- Name:AL
- Location:Belconnen ACT
- Car:SMP LJ GTR V8 Prototype-Confirmed By HHS and Ex GMH XW7 Engineers
- Joined: 09-April 09
Posted 21 April 2018 - 09:23 PM
www.gmh-torana.com.au/forums/topic/80946-heavy-duty-finned-drums/
#25
rodomo
-
- Members
-
- 17,998 posts
To advertise here, call 13TORANA
- Name:R - O - B Dammit!
- Location:Way out west of Melbourne Awstraylya
- Joined: 10-December 05
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users
